D'oh! As usual I forgot to actually attach the patch I mentioned. So
here it is ...
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -7574,6 +7574,19 @@ StartupXLOG(void)
LWLockRelease(XidGenLock);
}
+ /*
+ * Assign subtransaction xids to the top level xid if the
+ * record has that information. This is required at most
+ * once per subtransactions.
+ */
+ if (TransactionIdIsValid(xlogreader->toplevel_xid) &&
+ standbyState >= STANDBY_INITIALIZED)
+ {
+ Assert(XLogStandbyInfoActive());
+ ProcArrayApplyXidAssignment(xlogreader->toplevel_xid,
+ 1, &record->xl_xid);
+ }
+
/*
* Before replaying this record, check if this record causes
* the current timeline to change. The record is already
